Irish Seafood Chowder

Name: Irish Seafood Chowder
Prep time: 15 min
Cook time: 55 min
Total time: 1 h 10 min
Cuisine: European, British
Ingredients: 35 oz mussels, in the shell, rinsed, scrubbed and beards removed; 4 ½ oz yellow onions, cut into pieces; 2 oz pancetta, diced (¼ in.); 18 oz seafood stock; 20 oz russet potatoes, peeled, cubed (1 in.); 1 tbsp all-purpose flour; ½ tsp salt; ⅛ tsp ground black pepper; 8 oz heavy whipping cream; 6 oz cod fillet, diced (1 in.); 6 oz salmon, diced (1 in.); 6 sprigs fresh thyme, divided (4 sprigs leaves only, plus 2 sprigs to garnish); fresh baguette, to serve